Restrict 1x1 pixmap filling optimization to GXcopy

This restricts an optimization whereby the filling of 1x1 pixmaps
went around the driver-provided function to cases where the
source color is meant to be directly copied to the destination,
as opposed to other operations which should produce different
destination values than just the foreground color.

Signed-off-by: George Matsumura <[email protected]>
Reviewed-by: Michel Dänzer <[email protected]>
(cherry picked from commit 83826075e59c0393c16d2a2482dc5c9f2fdf4564)

Author: George Matsumura

exa/exa_accel.c

@@ -1037,7 +1037,7 @@ exaFillRegionSolid(DrawablePtr pDrawable, RegionPtr pRegion, Pixel pixel,
         if (pExaPixmap->pDamage &&
             pExaPixmap->sys_ptr && pDrawable->type == DRAWABLE_PIXMAP &&
             pDrawable->width == 1 && pDrawable->height == 1 &&
-            pDrawable->bitsPerPixel != 24) {
+            pDrawable->bitsPerPixel != 24 && alu == GXcopy) {
             RegionPtr pending_damage = DamagePendingRegion(pExaPixmap->pDamage);
 
             switch (pDrawable->bitsPerPixel) {